JPH09282922A - Color changer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent sagging, facilitate replacement, and increase movement speed of filters by connecting band-shaped filters through a spiral spring to a driven drum having a driven pulley and to a drive drum having a driven pulley of a smaller diameter. SOLUTION: A motor 1 drives a drive drum 4 and a drive pulley 14 for rotation. Since the diameter of the pulley 14 is smaller than that of the driven pulley 10, the driven drum 3 rotates slower than the drive drum 4. However, since color filters 2 are wrapped around the drum 3, the movement speed of the filters 2 is about the same at the beginning and later the speed on the drive side becomes faster. This is absorbed with an urging force of a spiral spring 11. In the case the motor is rotated in reverse to rewind the filters 2, the drum 3 is made to rotate fast by the urging force of the spring 11 to wind the filters 2 under tension. Thus, the filters 2 are prevented from sagging, and a color changer of low noise is provided using only a single motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color changer which can be mounted on the front surface of a stage lighting fixture to change the light color of the stage lighting.

[0002]

2. Description of the Related Art For example, FIG. 10 shows a color changer 10 on a front surface of a spotlight 100 which is a stage lighting device.
1 is attached so that the light color for illuminating an irradiation target (not shown) can be freely changed. A conventional color changer of this type is shown in FIG. That is, in this color changer, filters of about 16 colors are usually continuously connected in a tape shape in a tape form to form a color filter 102, and both ends thereof are connected to two parallel drums 105 and 106. The drums 105 and 106 are connected to the motors 103 and 104, respectively, and the motor for winding the color film 102 is operated to move the color filter 102, while the other motors are stopped.

[0003]

However, this color changer is expensive because it uses two motors 103 and 104, and when the color filter 102 is driven or stopped at high speed, and this is repeated, Since the braking force of the stopped motor 103 or 104 is not synchronized, tension is lost in the color filter 102,
There is a drawback that the color filter 102 sags between the drums 105 and 106.

On the other hand, a driving drum to which a motor is connected and a tension drum containing a spring are arranged in parallel, the driving drum is driven by the motor, and the tension drum is rotated, for example, 5 times, and then the color filter is applied to the tension drum. Some of the ends were attached with polyester tape or the like. However, when exchanging the color filter, it is necessary to attach the color filter while holding and rotating the tension roller 5 times. Therefore, it is troublesome to exchange the filter, and if the color filter is attached without rotating 5 times,
There is a drawback that the color filter does not work due to slack.

When the color filter is slack, it is apt to malfunction, and the housing and the color filter are rubbed against each other, which causes noise. Therefore, there is a strong need for a color changer that moves quietly and at high speed. Therefore, an object of the present invention is to provide a color changer capable of preventing the slack of the color filter, easily replacing the color filter, and moving the color filter at high speed.

[0006]

According to a first aspect of the present invention, there is provided a color changer including a motor, a belt-shaped color filter having a large number of color filter portions continuously arranged in a longitudinal direction, and a winding start end of the color filter. A driven drum attached to the driven drum, a driven pulley connected to the driven drum via a spiral spring, and a drive pulley having a diameter smaller than that of the driven pulley, and having a diameter substantially the same as that of the driven drum and parallel to the driven drum. A driving drum that is disposed and that connects the winding end of the color filter and is connected to the motor, and a transmission body that is wound around the driving pulley and the driven pulley.

According to the color changer of the first aspect, when the motor is driven, the drive drum and the drive pulley rotate. Since the drive pulley has a smaller diameter than the driven pulley, the rotation speed of the drive drum is faster than that of the driven drum, but the color filter is wound on the side of the driven drum that has approximately the same diameter as the drive drum. Considering this, at the initial stage of rotation, the moving speeds of the driving side and the driven side of the color filter can be made approximately the same. Further, as the color filter is wound around the driving drum, the moving speed of the driving side of the color filter increases, and thus tension acts on the color filter to urge the spiral spring, which increases as the driving drum rotates. On the other hand, when the color filter is rewound on the driven drum by rotating the motor in the reverse direction, the spiral drum is biased, so the driven drum rotates faster than the driven pulley, and the color filter is wound with tension. , The spiral spring is de-energized as the driven drum rotates. Therefore, the slack of the color filter can be prevented, the color filter can be easily replaced as compared with the conventional example, the color filter can be moved at high speed, and a low noise color changer can be provided by a single motor.

According to a second aspect of the present invention, there is provided a color changer having a motor, a band-shaped color filter in which a large number of color filter portions are continuously arranged in a longitudinal direction, and a drive pulley, and a winding start end of the color filter is wound. A driving drum connected to the motor and attached to the motor, a driven drum having substantially the same diameter as the driving drum and arranged in parallel with the driving drum and connected to the winding end of the color filter, and a spiral spring attached to the driven drum. The driven pulley has a diameter smaller than that of the drive pulley and is connected to the drive pulley, and a transmission body wound around the drive pulley and the driven pulley.

According to the color changer of the second aspect, the driven pulley has a smaller diameter than the driving pulley, but the color filter is wound on the side of the driving drum having substantially the same diameter as the driven drum. Considering the winding diameter,
In the initial stage of rotation, the moving speeds of the driving side and the driven side of the color filter can be made approximately the same. Further, as the color filter is wound around the driven drum, the moving speed of the color filter on the driven side increases, and therefore tension is exerted on the color filter and the spiral spring is urged, and increases as the driven drum rotates. On the other hand, when the color filter is rewound on the drive drum by rotating the motor in the reverse direction, the spiral pulley is biased, so the driven pulley rotates faster than the driven drum, and the color filter is wound with tension. The spiral spring is deenergized as the driven pulley rotates. Therefore, the same effect as claim 1 is obtained.

According to a third aspect of the present invention, there is provided a color changer having a motor, a band-shaped color filter in which a large number of color filter portions are continuously arranged in a longitudinal direction, and a driving pulley, and the winding start end of the color filter is wound. A driving drum connected to the motor and attached, and a driven drum having a diameter larger than that of the driving drum and arranged in parallel to the driving drum to connect winding end ends of the color filters,
The driven drum includes a driven pulley connected to the driven drum through a spiral spring and having a diameter substantially the same as that of the drive pulley, and a transmission body wound around the drive pulley and the driven pulley.

According to the color changer of the third aspect, the driven pulley and the driving pulley have substantially the same diameter, and the driven drum is larger in diameter than the driving drum, but the color filter is wound on the driving drum side. Therefore, when the winding diameter of the color filter is taken into consideration, the moving speeds of the driving side and the driven side of the color filter can be made approximately the same in the initial stage of rotation. Further, as the color filter is wound around the driven drum, the moving speed of the color filter on the driven side increases, and therefore tension is exerted on the color filter and the spiral spring is urged, and increases as the driven drum rotates. On the other hand, when the color filter is rewound on the drive drum by rotating the motor in the reverse direction, the spiral pulley is biased, so the driven pulley rotates faster than the driven drum, and the color filter is wound with tension. , The spiral spring is de-energized as the driven drum rotates. Therefore, in addition to the same effect as in claim 1, the diameter of the driven drum can be increased, so that the spiral spring can be easily housed and the assembly becomes easy.

According to another aspect of the color changer of the present invention, a motor, a belt-shaped color filter in which a large number of color filter portions are continuously arranged in the longitudinal direction, and a driven drum around which a winding start end of the color filter is wound. The driven drum has a driven pulley connected to the driven drum via a spiral spring, and a drive pulley having substantially the same diameter as the driven pulley. The driven pulley has a diameter larger than that of the driven drum and is arranged parallel to the driven drum. A driving drum connected to the winding end of the color film and connected to the motor, and a transmission member wound around the driving pulley and the driven pulley.

According to the color changer of the fourth aspect, the driven pulley and the driving pulley have substantially the same diameter, and the driving drum has a larger diameter than the driven drum, but the color filter is wound on the driven drum side. Therefore, when the winding diameter of the color filter is taken into consideration, the moving speeds of the driving side and the driven side of the color filter can be made approximately the same in the initial stage of rotation. Further, as the color filter is wound around the driving drum, the moving speed of the driving side of the color filter increases, and thus tension acts on the color filter to urge the spiral spring, which increases as the driving drum rotates. On the other hand, when the color filter is rewound on the driven drum by rotating the motor in the reverse direction, the spiral drum is biased, so the driven drum rotates faster than the driven pulley, and the color filter is wound with tension. , The spiral spring is de-energized as the driven drum rotates. Therefore, the same effect as claim 1 is obtained.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIGS. That is, this color changer has a motor 1, a color filter 2, a driven drum 3, a drive drum 4, and a transmission body 5. The motor 1 is attached to a lower left support plate 17 of the support plates 16 and 17 provided in the upper and lower positions in the housing 6 on the left side in FIG. ing. The housing 6 has an opening / closing lid on the back surface and has openings (not shown) facing the front surface and the opening / closing lid,
For example, a spotlight is arranged in one of the openings as shown in FIG. 13, and light is emitted toward the stage or the like through the opening. A drive pulley 25 having teeth is provided on the drive shaft 18.

[0015] The color filter 2, a plurality of filter portions 2 ₁ to 2n a strip those aligned consecutively in the longitudinal direction, n (e.g. n = 16) as shown in FIG. 2 types of filter section 2 _{1 to} 2n are cut into a certain size and attached in a band shape with tape, and a winding start end 2a and a winding end end 2b are provided at both ends. 15 ₀ , 15 _{1 to} 15 n, and 15 m are markers provided on the filters 2 _{1 to} 2 n, the winding start end 2 a, and the winding end end 2 b, respectively, and marker tapes are attached to the markers. This marker is read by the sensor 19 provided on the support plate 17 near the opening of the housing 6,
The filter portions 2 _{1 to} 2n that face the openings are selected.

The driven drum 3 is wound around the winding start end 2a of the color filter 2. In the embodiment, it has a hollow cylindrical body 3a around which the winding start end 2a of the color filter 2 is wound, and shaft portions 3b at both ends thereof. The shaft portion 3b includes fitting portions 7 and 7a that fit into the end portion of the cylindrical body 3a, a collar 8 that abuts against the end surface of the cylindrical body 3a, and a shaft 9 that is provided at the center of the fitting portions 7 and 7a and the collar 8. Have and. The diameter of the fitting portion 7a is the cylindrical body 3a.
The inner diameter is smaller than the inner diameter, and the fitting portion 7a is loosely fitted in the cylindrical body 3a. Then, the shaft 9 and the bearing 20
The bearing 20 is fixed to the right end side of the support plates 16 and 17 in FIG.

The driven pulley 10 is connected to the driven drum 3 via a spiral spring 11. In the embodiment, the driven pulley 10 is provided with teeth and is provided on the outer surface of the collar 8 on the fitting portion 7a side. In the spiral spring 11, as shown in FIG. 3, the inner end 11a of the spiral spring 11 is locked in the insertion groove 12 formed at the inward protruding end of the shaft 9, and the outer end 11b of the thin spiral spring 11 is made into the cylindrical body 3a. It is connected to the cylindrical body 3a by a connecting tool (not shown) through a mounting hole 31 formed on the inner surface of the.

The drive drum 4 has a drive pulley 14 having a diameter smaller than that of the driven pulley 10 and is arranged in parallel with the driven drum 3 with substantially the same diameter as that of the driven drum 3 and at the end of winding of the color filter 2. 2b are connected and connected to the motor 1. In the embodiment, the hollow cylindrical body 4a has the same diameter as the cylindrical body 3a, and the shaft portions 4b provided at both ends thereof, and the shaft portion 4b is fitted to the both ends of the cylindrical body 4a.
A collar 22 that abuts the end surface of the cylindrical body 4a, and the fitting portion 2
1 and a shaft 23 located at the center of the collar 22.
As shown in FIG. 4, the fitting portion 21 and the cylindrical body 4a are integrally joined by locking the projection 30 as a joining means in the recess of the fitting portion 21 by driving or the like. Another brim 2
A toothed drive pulley 14 and a transmission pulley 24 are provided on the opposite side of the second fitting portion 21. Then, the bearing 20 is passed through the shaft 23, and the bearing 20 is fixed to the left side of the driving shaft 18 of FIG. Further, the driving belt 26 having teeth on the driving pulley 25 and the transmission pulley 24.
Is wrapped around. At this time, the transmission pulley 24 is made larger in diameter than the driving pulley 25 to form a speed reducer.

Here, the driving drum 4 and the driven drum 3
The outer diameter d of both is about 30 mm, and the drive pulley 1
The outer diameter of 4 is about 38.3 mm in diameter and the number of teeth is 60. The outer diameter of the driven pulley 10 is about 44.77 mm in diameter and the number of teeth is 70, and the maximum outer diameter when the color filter 2 is wound around the driven drum 3. As the diameter D, the diameter of the drive pulley 14 vs. the diameter of the driven pulley 10 is d: D. Here, d <D.

The transmission body 5 is wound around the drive pulley 14 and the driven pulley 10. In the embodiment, a belt having teeth that mesh with the teeth of the drive pulley 14 and the driven pulley 10 is used. Further, the compression coil spring 33 is passed through the shaft portions 9 and 23 of the driven drum 3 and the drive drum 4, and the compression coil spring 33 is interposed between the bearing 20 and the flanges 8 and 22 side. This prevents the bearing 20 from rattling in the thrust direction when the drive drum 4 and the driven drum 3 rotate, thereby reducing noise.

The operation of this color changer will be described with reference to FIG. That is, FIG. 5A shows a state in which the color filter 2 is wound around the driven drum 3. At this time, the driving drum 4 has the outer diameter d, but the driven drum 3 side has the outer diameter D including the winding amount of the color filter 2, while the driving pulley 1
The diameter of No. 4 vs. the diameter of the driven pulley 10 is d: D. FIG. 5B shows a state in which the motor 1 is driven in the arrow direction,
The drive drum 4 and the drive pulley 14 rotate in the same direction. Since the driving pulley 14 has a smaller diameter than the driven pulley 10, the rotation speed of the driving drum 4 is faster than that of the driven drum 3.
Since the color filter 2 is wound on the side of the driven drum 3 having substantially the same diameter as the driving drum 4, in consideration of the winding diameter of the color filter 2, the moving speed of the driving side and the driven side of the color filter 2 in the initial stage of rotation is high. Are about the same. In this way, when the driving speed and the driven side of the color filter 2 are about the same, the color filter 2 does not sag. Therefore, the extent to which the color filter 2 does not sag depends on the diameters of the driven drum 3, the driving drum 4, the driven pulley 10 and the driving pulley 14 and the winding diameter of the color filter 2.

FIG. 5 (c) shows the operation of (b) above.
A state where tension acts on the color filter 2 and the spiral spring 11 is biased is shown. That is, as the color filter 2 is wound around the driving drum 4, the moving speed of the driving side of the color filter 2 is increased, so that tension acts on the color filter 2 and the spiral spring 11 is urged, and the driving drum 4 is driven. The rotational speed of the color filter 2 increases and the speed at which the color filter 2 separates from the driven drum 3 slows down. In this way, since the color filter 2 is pulled by the drive drum 4, the driven drum 3 rotates faster than the driven pulley 10, so that the spiral spring 11 is urged and the color filter 2 receives tension and does not sag. .

FIG. 5D shows a case where the motor 1 is rotated in the reverse direction to return the color filter 2 to the driven drum 3.
Since the spiral spring 11 is biased, the driven drum 4 rotates faster than the driven pulley 3 and wraps around the driven drum 4 while giving tension to the color filter 2, and the spiral spring 11 rotates the driven drum 3. Will be depleted along with.

According to this embodiment, the slack of the color filter 2 can be prevented, the color filter 2 can be easily replaced as compared with the conventional example, the color filter 2 can be moved at a high speed, and a single motor can be used. 1 can provide a low noise color changer. The color filter 2 is first
It is necessary to select the drum around which is wound, and this can be solved by displaying it on the surface of the drum.

A second embodiment of the present invention is shown in FIGS. 6 and 7. That is, this color changer is
In the embodiment, the winding start end 2a of the color filter 2 is wound around the driving drum 4, the winding end end 2b of the color filter 2 is connected to the driven drum 3 having substantially the same diameter as the driving drum 4, and the driving pulley 14 The diameter of the driven pulley 10 is smaller than that of the driven pulley 10. Specifically, the dimensional relationship is the same as the dimensional relationship when the drive pulley 14 and the driven pulley 10 of the first embodiment are exchanged. Other configurations are the same as those of the first embodiment.

According to this embodiment, the driven pulley 10
Is smaller than the drive pulley 14, but the color filter 2 is wound on the side of the drive drum 4 having substantially the same diameter as the driven drum 3 as shown in FIG. In consideration of the above, the moving speeds of the driving side and the driven side of the color filter 2 are almost the same in the initial stage of rotation. FIG.
As shown in (b), as the color filter 2 is wound around the driven drum, the moving speed of the color filter 2 on the driven side increases, so that tension acts on the color filter 2 and the spiral spring 11 is biased. The power increases as the driven drum 3 rotates. On the other hand, as shown in FIG.
When the color filter 2 is rewound on the drive drum 4 by rotating the reverse direction, the spiral spring 11 is already biased,
The driven pulley 10 rotates faster than the driven drum 3 and wraps around the color filter 2 while giving tension to the color filter 2, and the spiral spring 11 is deenergized as the driven pulley 10 rotates. Therefore, the same effect as the first embodiment is obtained.

A third embodiment of the present invention is shown in FIG. In other words, this color changer has the drive drum 4
In the second embodiment in which the winding start end 2a of the color filter 2 is wound on the side, the driven drum 3 is made larger in diameter than the driving drum 4, and the drive pulley 14 and the driven pulley 10 are made to have substantially the same diameter. Others are the same as those in the second embodiment.

According to this embodiment, the driven pulley 10
The drive pulley 14 has substantially the same diameter, and the driven drum 3 has a larger diameter than the drive drum 4. However, since the color filter 2 is wound around the drive drum 4, the winding diameter of the color filter 2 is considered. At the initial stage of rotation, the moving speeds of the driving side and the driven side of the color filter 2 are almost the same. Further, as the color filter 2 is wound around the driven drum 3, the moving speed of the color filter 2 on the driven side increases, so that tension acts on the color filter 2 to urge the spiral spring 11 to rotate the driven drum 3. Increase with. On the other hand, when the color filter 2 is rewound on the drive drum 4 by rotating the motor 1 in the reverse direction, since the spiral spring 11 is biased,
The driven pulley 10 rotates faster than the driven drum 3 and wraps around the color filter 2 while giving tension to the color filter 2, and the spiral spring 11 is deenergized as the driven pulley 10 rotates. Therefore, the same effect as in the first embodiment can be obtained, and the diameter of the driven drum 3 can be increased, so that the spiral spring 11 can be easily housed and the assembling can be facilitated.

A fourth embodiment of the present invention is shown in FIG. That is, in this color changer, in the first embodiment, the drive drum 4 is larger in diameter than the driven drum 3, and the drive pulley 14 and the driven pulley 10 have substantially the same diameter. Others are the same as in the first embodiment. According to this embodiment, the driven pulley 10 and the drive pulley 1 are
4 has substantially the same diameter, and the driving drum 4 is larger in diameter than the driven drum 3, but since the color filter 2 is wound on the driven drum 3 side, in consideration of the winding diameter of the color filter 2, the initial rotation The moving speeds of the driving side and the driven side of the color filter 2 are approximately the same. Further, as the color filter 2 is wound around the driving drum 4, the moving speed of the driving side of the color filter 2 is increased. Therefore, tension acts on the color filter 2 to urge the spiral spring 11 to rotate the driving drum 4. Increase with. On the other hand, when the motor 1 is rotated in the reverse direction and the color filter 2 is rewound on the driven drum 3,
Since the spiral spring 11 is biased, the driven pulley 10
The driven drum 3 rotates faster than the driven drum 3 and wraps around the color filter 2 with tension, and the spiral spring 11 is deenergized as the driven drum 3 rotates. Therefore, the same effect as the first embodiment is obtained.

In the embodiment, the motor 1 drives the drive drum 4 via the speed reducer, but the drive drum 4
The motor 1 may be directly connected to and directly driven. Further, in the present invention, the spring 33 may be omitted. Furthermore, the color filter 2 is not limited to the embodiment, and may be any color filter unit in which a large number of color filter units are continuously arranged.

[0031]

According to the color changer of the first aspect, when the motor is driven, the drive drum and the drive pulley rotate. Since the drive pulley has a smaller diameter than the driven pulley, the rotation speed of the drive drum is faster than that of the driven drum, but the color filter is wound on the side of the driven drum that has approximately the same diameter as the drive drum. Considering this, at the initial stage of rotation, the moving speeds of the driving side and the driven side of the color filter can be made approximately the same. Further, as the color filter is wound around the driving drum, the moving speed of the driving side of the color filter increases, and thus tension acts on the color filter to urge the spiral spring, which increases as the driving drum rotates. On the other hand, when the color filter is rewound on the driven drum by rotating the motor in the reverse direction, the spiral drum is biased, so the driven drum rotates faster than the driven pulley, and the color filter is wound with tension. , The spiral spring is de-energized as the driven drum rotates. Therefore, the slack of the color filter can be prevented, the color filter can be easily replaced as compared with the conventional example, the color filter can be moved at high speed, and a low noise color changer can be provided by a single motor.

According to the color changer of the second aspect, the diameter of the driven pulley is smaller than that of the driving pulley, but the color filter is wound on the side of the driving drum having substantially the same diameter as the driven drum. Considering the winding diameter,
In the initial stage of rotation, the moving speeds of the driving side and the driven side of the color filter can be made approximately the same. Further, as the color filter is wound around the driven drum, the moving speed of the color filter on the driven side increases, and therefore tension is exerted on the color filter and the spiral spring is urged, and increases as the driven drum rotates. On the other hand, when the color filter is rewound on the drive drum by rotating the motor in the reverse direction, the spiral pulley is biased, so the driven pulley rotates faster than the driven drum, and the color filter is wound with tension. The spiral spring is deenergized as the driven pulley rotates. Therefore, the same effect as claim 1 is obtained.

According to the color changer of the third aspect, the driven pulley and the driving pulley have substantially the same diameter, and the driven drum is larger than the driving drum, but the color filter is wound on the driving drum side. Therefore, when the winding diameter of the color filter is taken into consideration, the moving speeds of the driving side and the driven side of the color filter can be made approximately the same in the initial stage of rotation. Further, as the color filter is wound around the driven drum, the moving speed of the color filter on the driven side increases, and therefore tension is exerted on the color filter and the spiral spring is urged, and increases as the driven drum rotates. On the other hand, when the color filter is rewound on the drive drum by rotating the motor in the reverse direction, the spiral pulley is biased, so the driven pulley rotates faster than the driven drum, and the color filter is wound with tension. , The spiral spring is de-energized as the driven drum rotates. Therefore, in addition to the same effect as in claim 1, the diameter of the driven drum can be increased, so that the spiral spring can be easily housed and the assembly becomes easy.

According to the color changer of the fourth aspect, the driven pulley and the driving pulley have substantially the same diameter, and the driving drum has a larger diameter than the driven drum, but the color filter is wound on the driven drum side. Therefore, when the winding diameter of the color filter is taken into consideration, the moving speeds of the driving side and the driven side of the color filter can be made approximately the same in the initial stage of rotation. Further, as the color filter is wound around the driving drum, the moving speed of the driving side of the color filter increases, and thus tension acts on the color filter to urge the spiral spring, which increases as the driving drum rotates. On the other hand, when the color filter is rewound on the driven drum by rotating the motor in the reverse direction, the spiral drum is biased, so the driven drum rotates faster than the driven pulley, and the color filter is wound with tension. , The spiral spring is de-energized as the driven drum rotates. Therefore, the same effect as claim 1 is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a partially cutaway front view of a developed state of a color filter.

FIG. 3 is a partially exploded perspective view of a driven drum.

FIG. 4 is a sectional view showing a driven pulley and a drive pulley.

FIG. 5 is an operation explanatory diagram illustrating an operation.

FIG. 6 is an explanatory diagram of the second embodiment.

FIG. 7 is an explanatory diagram of the operation.

FIG. 8 is an explanatory diagram of the third embodiment.

FIG. 9 is an explanatory diagram of the fourth embodiment.

FIG. 10 is a side view showing a stage luminaire equipped with a color changer.

FIG. 11 is a schematic front view of a conventional color changer.

[Explanation of symbols]

 1 Motor 2 Color Filter 2a Winding End 2b Winding End 3 Driven Drum 4 Drive Drum 5 Transmission Body 10 Driven Pulley 11 Spiral Spring 14 Drive Pulley

Claims (4)

[Claims] 1. A motor, a belt-shaped color filter in which a large number of color filter portions are continuously arranged in a longitudinal direction, a driven drum around which a winding start end of the color filter is wound,
A driven pulley connected to the driven drum via a spiral spring, and a drive pulley having a diameter smaller than that of the driven pulley are arranged in parallel with the driven drum with substantially the same diameter as the driven drum. A color changer comprising: a drive drum that connects a winding end of a filter and is connected to the motor; and a transmission body that is wound around the drive pulley and the driven pulley. 2. A motor, a belt-shaped color filter in which a large number of color filter portions are continuously arranged in the longitudinal direction, and a drive pulley are provided to wind the winding start end of the color filter and to be connected to the motor. Drive drum, a driven drum which has substantially the same diameter as the drive drum and is arranged parallel to the drive drum, and which connects the winding end of the color filter, and the driven drum which is connected to the driven drum via a spiral spring. A color changer comprising a driven pulley having a diameter smaller than that of the pulley, and a transmission body wound around the drive pulley and the driven pulley. 3. A motor, a band-shaped color filter in which a large number of color filter portions are continuously arranged in a longitudinal direction, and a drive pulley are provided to wind a winding start end of the color filter and to be connected to the motor. A driving drum, a driven drum having a diameter larger than that of the driving drum, arranged parallel to the driving drum, and connected to a winding end of the color filter, and connected to the driven drum via a spiral spring. A driven pulley having substantially the same diameter as the drive pulley,
A color changer comprising: a drive pulley and a transmission body wound around the driven pulley. 4. A motor, a band-shaped color filter in which a large number of color filter portions are continuously arranged in the longitudinal direction, a driven drum around which a winding start end of the color filter is wound,
The driven drum has a driven pulley connected to the driven drum via a spiral spring, and a drive pulley having substantially the same diameter as the driven pulley. The driven pulley has a diameter larger than that of the driven drum and is arranged parallel to the driven drum. A drive drum connecting the winding end of the color film and connected to the motor;
A color changer comprising: a drive pulley and a transmission body wound around the driven pulley.